Braking motion for looms for weaving



May 13 1924. 1,493,591

J. ASPIN BRAKING MOTION FORLOOMS FOR WEAVING Filed Octl 22 1923 2 Sheets-Sheet 1 O U INVEOR. Q) d s Q91 Wm May 13 1924. 1,493,591

- u. ASPIN BRAKING MOTION FOR LOOMS FOR WEAVING' Filed Oct. 22 1923 2 Sheets-Sheet 2 INVENTOR I Patented May 13, 1924.

s'rrEs JOHN ASPIN', OF PRESTON, ENGLAND.

BRAKING MOTION FOR LOOMS FOR WEAVING.

Application filed October 22, 1923. Serial No. 670,117.

To (ZZZ whom a may concern:

Be it known that I, JOHN AsriN, a British subject, residing at Preston, county of Lancaster, England, have invented certain new and useful Improvements in Braking Motions for Looms for Weaving, of which the following is a specification.-

This invention relates to improvements in let off or weighting motions for the warp beams of looms for weaving of the type in which the weight rope or chain at each end of the beam is attached to one end of a bell crank lever fulcrumed on the frame of the loom, the other ends of the bell crank lever being connected together through a spring or springs which apply the desired tension on to the ends of the warp beam.

According to the present invention the ends of the bell crank levers which are connected together through a spring or springs extend vertically upwards some distance above the beam and a spring or springs are connected to the end of one lever and to a chain, rod or the like connected to the end of the other lever.

The invention will be described with reference to the accompanying drawings.

Fig. 1 is a view from the rear of a loom with the let off or weighting motion applied thereto.

Fig. 2 is a view of a modified arrangement.

Fig. 3 is a detail view of lever forming the tension releasing motion.

5 Fig. 4 is a detail view showing construction of bell crank lever.

Fig. 5 is a detail view of modified adjustable bracket on which the bell crank lever may be fulcrumed.

Two bell crank levers A A are pivoted one at each end of the frame either directly thereto or to an adjust-able bracket B. The adjustable bracket B is made in two parts (see Fig. 5) the part Z2 being afiixed to the frame of the loom and the part 7 sliding in relation to the part b. The part 7) is provided with a projecting bolt 72 and the part b with. a slot 5 which slides over the bolt 7). By tightening up a nut on the bolt b the part b can be locked in any desired position. The part 72 carries a stud b on. which the bell crank lever is fulcrumed.

Each bell crank lever is as shown in Fig. 4 made in three parts, a vertical arm or extending above the beam C and two horizontal arms a a a projection a on the arm a engaging in an aperture a in the arm o The arms a a and a are locked together by a bolt a passing through them. The bell crank lever is fulcrumed at a on the stud Z) of the adjustable bracket B or on a similar stud carried on the frame. The horizontal arms a a are provided with holes a to receive pins or screws carrying a hook at to which the ends of the weighting chain D passing round the end of the warp beam C are attached. 1

The upper end of the vertical arm of the bell crank lever A carries a small lever E pivotally mounted thereon and held in the position shown in Figs. 1 and 2 by a stop e of semi-cylindrical shape. A hook f is at tached to a projection e on the opposite end of the lever and to this hook is or are aflixed one, two or more springs G the other end of which is or are attached to a hook f at the end of a chain F as shown in Fig. 1, or a bar F as shown in Fig. 2. Where a chain F is employed the other end thereof is connected to a hook f affixed to the top of the vertical arm of the second bell crank lever A When a rod F is employed the end thereof is screwed and passes through a lug at the top of the vertical arm of the bell crank lever A a nut in the form of a handle wheel F being employed to tighten up the bar.

The tension between the two bell crank levers A A can be adjusted by shortening or lengthening the chains F or rod F and by varying the spring or springs G, springs of different size being employed as desired.

The lever E allows the tension on the warp beam to be readily removed by merely turning the lever upwards into or beyond the vertical position.

The bell crank levers are provided with safety chains 9 connected to the frame of the loom so that should a. spring G break from any cause the lever will not drop on to the floor.

hat I claim my invention and desire to protect by Letters Patent is 1. In a warp beam weighting mot-ion for looms for weaving the combination with the chains passing around the ends of the beam, of two pivoted bell crank levers extending upwards above the beam, a tensioning spring connected to the upper end of one bell crank lever and a chain connected at one end to the tensioning spring and at the other end to the upper end of the second bell crank lever.

2. In a Warp beam Weighting motion for looms for Weaving the combination with the chains passing around the ends of the beam, of two pivoted bell crank levers extending upwards above the beam; a releasing lever pivoted to the upper end of one hell crank lever, a tensioning spring connected to the releasing lever and chain connected at one end to e nsi i g Spring. d a he other to the upper end of the second bell rank l 3. In a Warp, beam Weighting motion for looms for weaving the combination with the chains passing around the ends of the beam, of two pivoted bell crank levers extending upwards above the beam, two adjustable brackets on each of which one hell crank leve is. f l un d, a e e s ng le e p voted. to the upper end of one bellbran'k lever, a tensioning spring connected to the releasing lever and achain connectedv at one end, to

the tensioning spring and at the other to the upper end of the second bell crank lever.

4. In a Warp beam weighting motion "for looms for Weaving the combination with each of the chains passing around the ends of the beam of two horizontal levers, a vertical lever carried between the horizontal levers forming a bell crank lever, an adjustable bracket on which said bell crank lever is pivoted, a releasing lever pivoted to the upper end of one bell crank lever, a tensioning spring connected to the releasing lever and a chain connected at one end to the tensioning spring and at the other tothe upper end of the second bell crank leve In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JQHN ASP-IN.

i ne ses: 1. H. CLARKE,

WALTER BAR ER- 

